<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div class="app">
        <ul>
            <li v-for="(item,index) in list" :key="index">{{item}}</li>
        </ul>
        <button @click="fn">你们毁了他的医生</button>
    </div>
    <script src="./vue.js"></script>
    <script>
        const app = new Vue({
            el: '.app',
            data: {
                list: [
                    '荔枝',
                    '油饼',
                    '虾头'
                ],
            },
            methods: {
                fn() {
                    const res = this.list.shift()
                    this.list.push(res)
                }
            }
        })
    </script>
</body>

</html>